E-payment plays an important role in modern daily life, so the security problem of E-payment has been widely concerned by researchers. In a recent paper [Int. J. Theor. Phys. 57, 2657 (2018)], the authors presented a trusted third-party E-payment protocol based on quantum blind signature without entanglement. In this paper, we show that there is a serious security flaw in their E-payment protocol. That is, the partial keys will be disclosed by performing a simple attack strategy. Furthermore, we propose an improved E-payment protocol and analyze its security.

中文翻译：

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一种基于无纠缠量子盲签名的改进电子支付协议

电子支付在现代日常生活中发挥着重要作用，因此电子支付的安全问题一直受到研究人员的广泛关注。在最近的一篇论文中 [Int. J.理论。物理。57, 2657 (2018)]，作者提出了一种基于无纠缠的量子盲签名的可信第三方电子支付协议。在本文中，我们表明他们的电子支付协议存在严重的安全漏洞。也就是说，部分密钥将通过执行简单的攻击策略来公开。此外，我们提出了一种改进的电子支付协议并分析了它的安全性。